.main tr .category {
    width:80px;
}
.main tr .model {
    width:264px;
    text-align:left;
}
.main tr .brand {
    width:80px;
}
.main tr .time {
    width:120px;
}
.main tr .price {
    width:60px;
}
.main tr .sales {
    width:80px;
}
.main tr .operation {
    width:100px;
}